Johnson Controls DVN 5000 Series, Manual, Page: 41 / 46

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Johnson Controls DVN 5000 Series Manual Download Page 41

Environmental Guidelines

DVN 5000

24-10520-22 Rev. –

39

This document contains confidential and proprietary information of Johnson Controls, Inc.
© 2009 Johnson Controls, Inc.

Thermal Solutions

Figure 26: Vent Blockers

Careful placement of vent blockers, as part of your proper thermal management
planning, helps prevent the short-circuiting of airflow in rack enclosures. Vent
blockers magnetized on one side help force the heated enclosure air out through
top-mounted exhaust fans.

Upper Inside Side Panel

Upper Inside Rear Door

Enclosure Upper Faces

Vibration

Hard drives are very sensitive to vibration from other drives and nearby fans. This
causes the read/write head to stop momentarily, which slows the system, or can even
cause a head crash. Mounting DVNs near the top of the rack causes more vibration
and early disk drive failures. The three year life is reduced to two years in actual
cases observed.

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Summary of Contents for DVN 5000 Series

Page 1: ...Storage Shipping and Environmental Guidelines Digital Vision Network 5000 Series October 2009 24 10520 22 Revision...

Page 2: ...uction manual may cause interference to radio communications It has been tested and found to comply with the limits for a Class A computing device pursuant to Part 15 of FCC Rules which are designed t...

Page 3: ...re technical support assistance contact the Johnson Controls Product Sales Team at 1 800 ASK JNSN 1 800 275 5676 for 24 hour assistance in the USA Technical Support at 805 582 3117 menu option 5 in th...

Page 4: ...uipment s warranty If you wish to keep your current data drives purchase new data drives and ship the new ones back with the RMA External DVN 5000 disk drives must be removed from the chassis prior to...

Page 5: ...drives with the RMA by exporting video to one or more DVDs For more information on exporting video refer to the DVN 5000 Series Software Installation and Configuration Manual which can be downloaded f...

Page 6: ...to the guidelines previously described Viewing the DVN s Current Network Settings Since you may need to manually reconfigure the DVN s network settings once the DVN is returned to you from the repair...

Page 7: ...ve the DVN configuration settings to a USB flash drive so that they can be uploaded imported if necessary once the DVN is returned to you from the repair center If you do not export the system configu...

Page 8: ...ration screen appears 5 Enter a descriptive name for the configuration file so the DVN configuration can be easily identified amongst other DVN configuration files 6 Save the configuration file to you...

Page 9: ...s this may cause the unit to overheat Leave room at the back and right side on newer cases of the DVN since these areas are the hot air exits Since the 19 inch rack has a high concentration of heat in...

Page 10: ...ne RAID drive message 2 Open the front panel and monitor the status Light Emitting Diode LED of each RAID drive A red LED indicates the drive has failed and must be replaced For information on replaci...

Page 11: ...own Thermal design of equipment racks and enclosures is essential for the continued functioning of DVN equipment when subjected to the surrounding environment The most robust designs for thermal manag...

Page 12: ...void common mistakes use the following guidelines when considering the thermal design of equipment racks and enclosures for use with the DVN 5000 product Important Considerations Consider how the room...

Page 13: ...temperature levels A room that is too hot results in DVN drive failures A room that is too cold can generate condensation damaging the DVN s internal components Locating the racks directly under supp...

Page 14: ...ir In general it is more effective to work with natural convection and remove the heated air from the top of the rack while letting cooler room air enter at or near the bottom Several examples are sho...

Page 15: ...roprietary information of Johnson Controls Inc 2009 Johnson Controls Inc Enclosure Designs For passive convection no fan applications wider racks are beneficial spacious sides around mounted equipment...

Page 16: ...y way to introduce air is through the front of the rack Additionally incorporating a fan top is the best way to exhaust the air When top mount fans are required select an enclosure without venting bui...

Page 17: ...he equipment Radiated Dissipation Non vented solid areas of all racks dissipate internal heat to the outside by radiation As the internal temperature rises so does the temperature of the sheet metal e...

Page 18: ...it none in the middle for effective chimney flow and an unimpeded airflow inside the rack When using passive convection limit the number of DVN 5000 units in a rack to 1 Installing additional DVNs or...

Page 19: ...ssis The following diagrams show this arrangement with passive convection As with any passive convection scheme the more venting up top the better Choose racks that have vents built into the top face...

Page 20: ...Forced Air Active Thermal Management In certain cases when there is too much heat BTU Hr for natural convection to properly perform this task it is essential to force the heated air from the rack Acti...

Page 21: ...ommended in this situation to control airflow from front to rear However adequate 6 minimum clearance needs to be between the rear door and rear exhaust outlets of the equipment It is important to not...

Page 22: ...9 Johnson Controls Inc A high performance alternative method for forced air heat removal in thermally dense installations can be achieved through the use of a high CFM rear door These doors typically...

Page 23: ...Vented Floor Grate with High Density Servers Network Video Recorders NVRs and Switches Environmental Guidelines DVN 5000 24 10520 22 Rev 21 This document contains confidential and proprietary informa...

Page 24: ...ollowing are minimum recommendations on the number of rackspaces of venting needed more venting is better if properly placed See the diagrams elsewhere in this document for proper and improper vent pl...

Page 25: ...nted area must not be less than specified in Table 3 Vented Shelves Shelves are an important component of the internal airflow planning process Shelf surfaces that overhang the internal natural rise o...

Page 26: ...s Condensation increases equipment downtime The ideal spot for fan placement in clean environments is in the top of the rack where the hotter air needs to be removed This also aids the natural force o...

Page 27: ...re than any other component Since fans wear out faster at higher speeds the most practical way to extend fan life is to use a proportional speed thermostatic fan control circuit which extends equipmen...

Page 28: ...k fan will increase the airflow As you can see from the Parallel vs Series Fans chart Figure 17 on page 27 all this provides is a greater static pressure It does not increase the airflow The only way...

Page 29: ...Controls Inc Filters Rack filters which can be mounted over fans or used as a filtered vent panel help protect digital and other sensitive equipment from hygroscopic dust failure i e when dust absorb...

Page 30: ...t For example the filters must be cleaned after the drywall is installed since drywall dust effectively blocks the filter Filter loading and subsequent maintenance requirements can be greatly reduced...

Page 31: ...f Forced Air Filtered without Front Intakes on Equipment Environmental Guidelines DVN 5000 24 10520 22 Rev 29 This document contains confidential and proprietary information of Johnson Controls Inc 20...

Page 32: ...ced Air Filtered with and without Front Intakes on Equipment DVN 5000 Environmental Guidelines 30 24 10520 22 Rev This document contains confidential and proprietary information of Johnson Controls In...

Page 33: ...Racks Pressurizing the rack rather than sucking the air out of the top is the best solution for dusty or dirty environments where filters need to be changed regularly Figure 20 Correct Use of Pressur...

Page 34: ...anufacturers Association NEMA should be installed Heat exchangers and air conditioning units mostly installed in NEMA rated racks do not allow the ambient dirty air to mix with the enclosure interior...

Page 35: ...some enclosures other enclosures will not get the required airflow and equipment may overheat Airflow under the computer floor must be directed and managed which can only be accomplished by measuring...

Page 36: ...c 2009 Johnson Controls Inc A balanced system uses cool air effectively by not allowing it to re circulate back to the HVAC unit without removing heat In a data center system designed for airflow the...

Page 37: ...etary information of Johnson Controls Inc 2009 Johnson Controls Inc To introduce cool air into enclosures on a raised computer floor provide an air outlet grate in front of the rack recommended see Fi...

Page 38: ...arrangement in rows of two to produce both hot and cold aisles see Figure 24 The front of the racks face each other in the cold aisle with air grating down the center for cold air supply The rear of...

Page 39: ...btain minimum ventilation requirements 1 Mark ambient room temperature in column C and connect points in B and C with a straight edge 2 The minimum cooling required providing an interior rack temperat...

Page 40: ...mograph for Calculating Required Ventilation DVN 5000 Environmental Guidelines 38 24 10520 22 Rev This document contains confidential and proprietary information of Johnson Controls Inc 2009 Johnson C...

Page 41: ...ck enclosures Vent blockers magnetized on one side help force the heated enclosure air out through top mounted exhaust fans Upper Inside Side Panel Upper Inside Rear Door Enclosure Upper Faces Vibrati...

Page 42: ...quick short term fix open the rear door and place a floor fan facing the rear to lower the rack s temperature Do not use this method as a long term fix however it may keep heat sensitive equipment wo...

Page 43: ...the RAID drive LEDs for any data drives that may be in a critical state or that have failed The log file will show critical RAID drives Replace these drives 8 Review the log file for specific errors...

Page 44: ...nation point Where circuits are outfitted with ground fault detection test to ensure correct tripping and reset 9 Where present inspect the lens wiper blade and ensure correct operation over the compl...

Page 45: ...ete all applicable forms Task Description Date Performed 1 Visually and physically inspect all cable connectors 2 Visually inspect unit for damage or contamination 3 If applicable clean floppy drive u...

Page 46: ...5 Check for correct battery venting and air flow 6 Bypass the main s input direct to load 7 Measure battery charge voltage 8 Isolate the main s input and check output voltage 9 Visually inspect unit...

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